US3830100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strain gauge transducer transient voltage protection
Assignee: Statham Instrument Inc
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Filing: 1973-02-22
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Granted: 1974-08-20
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Expires: 1993-02-22
Abstract
Abstract This invention relates to transient high voltage protection devices for bonded filament strain gauges.
Inventors
- 👤 D Kamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:55
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/02; G01L9/06; G01L1/00; G01L1/20; G01L1/22; G01L1/225; G01L9/0041; G01L9/0051
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
A transducer, including an electrically conductive case, a force summing means mounted in said case, a plurality of bonded strain filaments mounted on said force summing means, an insulation layer between said filaments and said force summing means, said filaments connected into a Wheatstone bridge array, power input connections connected to opposite corners of the bridge and output connections connected to the other corners of said bridge, a Zener diode connected to one input connection and to the case and another Zener diode connected to the other input connection and to the case and a diode connected between the ends of each filament forming a leg of said bridge and bonded to said force summing means.
Claim 2
Dependent Claim
116 words
A transducer, including an electrically conductive case, a force summing means mounted in said case, a plurality of bonded strain filaments mounted on said force summing means, an insulation layer between said filaments and said force summing means, said filaments connected into a Wheatstone bridge array, power input connections connected to opposite corners of the bridge and output connections connected to the other corners of said bridge, a Zener diode connected to one input connection and to the case and another Zener diode connected to the other input connection and to the case and a diode connected between the ends of each filament forming a leg of said bridge and bonded to said force summing means.
Claim 3
Dependent Claim
24 words
The transducer of claim 1 in which there are four filaments mounted on said force summing means and connected into a Wheatstone bridge array.
Claim 4
Dependent Claim
28 words
The transducer of claim 1 in which the insulating layer is a silicon monoxide layer and the filaments are film deposited metallic resistors on said silicon monoxide layer.
Claim 5
Dependent Claim
24 words
The transducer of claim 3 in which there are four filaments mounted on said force summing means and connected into a Wheatstone bridge array.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |